Improvement in metal-cutting machines



A. S. BUNKER. Improvement in Met-aI-Qutting Machines.

No. 126,179, I PatentedApril30 1872.

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UNITED STATES ATENT FFIGE.

IMPROVEMENT IN METAL-CUTTING MACHINES.

Specification forming part of Letters Patent No. 126,179, dated April 30, 1872.

hun g in the frame, and carrying at their front ends circular cutters a a, which overlap each other to cut shear fashion. Behind each cutter is mounted upon or formed on each shaft a ring, b, the two rings serving to feed the material that is being cut. The shaft B can be adjusted up or down by means of a screw, g, to adapt the machine to material of greater or less thickness. d is a frictionspring bearing againstthe upper shaft B. e e are the pinions mounted upon the shafts B O to transmit the motion, which is imparted to one by means of a crank-handle, f.

Having thus described my invention, I claim as new and desire to secure by Letters Patent In metal-cuttin g machinery, the combination of lapping circular knives a a and feed-rolls b b, arranged on the same pair of shafts, as and for the purpose described.

AUGUSTUS S. BUNKER.

Witnesses:

CALEB SAUNDERS, CHAS. D. MOORE. 

